Improvement in non-conducting compounds



QR 20mm? eat" "2 i GEORGE ll. IHANS, OF SAN FRANCISCO, (,.\L1I-Ul.'l.\, ASSIGNOR ()F ON C- ll.-\LF IllS RIGHT TO GARRETT II. HOPPER, 0F SAME lLAtl'l.

IMPROVEMENT IN NON-CONDUCTING COMPOUNDS.

Specification forming part of Letters Patent No. 206,007, dated July 16. I 1: applicati n lilcd June 11, 1 57:.

T 0 all who: it may concern:

Ile it-known that I, GEORGE R. l-ZvANs, ot' the city and county of San Francisco, and State of California, have invented a File-Resisting and Non-Conducting Compound; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to a novel substance or compound which is useful as a lining for furnaces and other places which are to be exposed to a high degree ot'heat, and also as a min-conducting protector or covering for the outside of steam-boilers, pipes, aml for allpurposes in which a non-conductor is needed. As a lining for safes aml vaults it is especially valuabh I employ as a base aml principal part of my tum-conductor pctritied wood, which is obtainable in large quantities in some localities. This material I crash, grind, aml pulverize or otherwise reduce to a suitable condition of fineness. I then mix it with mica and tale in certain proportions, and add any substance to make a pasty mass aml give the necessary coherencc. This may he etl'eeted by the use of wet clay or plaster. Either of these may be used or any equivalent substance to form the compouml, the essential requisite of which is a pasty or coherent condition which will allow the material to be evenly and smoothly applied, and will give it a tenacity sutlicicnt to retain it in place after it is put on.

The proportions which 1 have found best suited to my purpose are three or four part of the petritied wood tincly pulverized, one part of pulverized mica, and one part of pulverized talc. These are mixed with sutlieient clay or other substance to make a pasty mass, aml may be applied to the boiler or pipes directly.

It will be seen that in the f rm of blocks, or in some cases laid on in sheets, my non-couducting compound maybe applied to furnaces or rooms as a non-conducting wall.

In some cases I employ one part at ashcstus with the above substances, amt the proportions may be somewhat varied without essentially changing; the character of my compound; and when employed as a covering I use a small proportion ot'plaster-ot'-paris to give ita smooth surface aml finish.

Having thus described my invention, what I claim, and desire to secure by Letters I'mout, is-

tile-resisting and non-comlucting: gun; pou id,eonsisting ot' pctriticd wood'as a hasc, in combination with .Iniea and talc. .in certain promotions, combincd'WdTT'EiTol'i i'ent tenacious material, substantially as and for the purpose lltl'tlll speciticd.

In witness whereof I have hereunto set my hand.

(ll-ZOItGI-I ll. EVANS. 

